A fixture for setting rebar at a predetermined distance from the rim of an excavated pit includes elongated first and second legs each having a proximal end and a distal end, the first and second legs rigidly joined at their mutual proximal ends to form an L-shape; an angle adjustment device carried by the first leg, comprising a foot movable towards or away from the first leg along an axis generally parallel to the second leg; a support bracket carried by the first leg at a predetermined offset distance from the proximal end thereof; and a hook extending from the distal end of the second leg, generally parallel to the first leg.

A fixture for setting rebar at a predetermined distance from the rim of an excavated pit includes elongated first and second legs each having a proximal end and a distal end, the first and second legs rigidly joined at their mutual proximal ends to form an L-shape; an angle adjustment device carried by the first leg, comprising a foot movable towards or away from the first leg along an axis generally parallel to the second leg; a support bracket carried by the first leg at a predetermined offset distance from the proximal end thereof; and a hook extending from the distal end of the second leg, generally parallel to the first leg.

The present invention provides a prefabricated floor panel system used in stay in place formwork for pouring concrete floors. The prefabricated floor panel system includes a top and has walls depending downwardly at an upper lateral edge of the wall from each outermost lateral edge of the top, a lower lateral edge of each wall having a ledge extending outwardly away from the top. A first ledge of one prefabricated floor panel system is capable of overlying another ledge of an adjacent prefabricated floor panel system to allow for the one prefabricated floor panel system to be joined to the adjacent prefabricated floor panel system to form a channel. The first ledge of the prefabricated floor panel system is provided with a reinforcing bar spaced away from the wall and the first ledge of the prefabricated floor panel system, the reinforcing bar being supported by a plurality of a reinforcing bar chairs spaced along the length of the prefabricated panel system, the reinforcing bar chairs being attached to the first ledge or wall such that there are no significant interfering structures projecting from a lower surface of the first ledge. The other ledge of the prefabricated floor panel system is free of interfering structures above the ledge to allow the first ledge of one prefabricated floor panel system to overlie the other ledge of an adjacent prefabricated floor panel system to allow for the one prefabricated floor panel system to be joined to the adjacent prefabricated floor panel system to form a channel.

A reinforcing framework (10) for the construction of reinforced concrete structures includes at least two spaced-apart mesh layers (202, 204). A plurality of spaced-apart spacers (206) are mounted between the mesh layers (202, 204) to support the two mesh layers (202, 204) spaced-apart in substantially parallel planes. Each spacer (206) has a cross member with a leg extending outwardly at each end of the cross member, said legs being substantially parallel to each other and substantially perpendicular to the cross member. Each leg has a foot at an outer end of the leg remote from the cross member, the foot being substantially perpendicular to the leg and substantially perpendicular to the cross member. The cross member is bent inwardly between the legs.

A reinforcing framework (10) for the construction of reinforced concrete structures includes at least two spaced-apart mesh layers (202, 204). A plurality of spaced-apart spacers (206) are mounted between the mesh layers (202, 204) to support the two mesh layers (202, 204) spaced-apart in substantially parallel planes. Each spacer (206) has a cross member with a leg extending outwardly at each end of the cross member, said legs being substantially parallel to each other and substantially perpendicular to the cross member. Each leg has a foot at an outer end of the leg remote from the cross member, the foot being substantially perpendicular to the leg and substantially perpendicular to the cross member. The cross member is bent inwardly between the legs.

A high-strength one-touch rebar coupler includes a coupler body having a hollow portion in the longitudinal direction. The coupler body is formed in a helical shape to provide the inner peripheral surface of the hollow portion with a rebar fastening force in the circumferential direction. The coupler body includes a first guide helix coupling portion, which has first guide sloping portions that slope from the center portion of the hollow portion towards the outside of one side thereof, and a second guide helix coupling portion, which has second guide sloping portions that slope from the center portion of the hollow portion towards the outside of the other side thereof. A first fastening unit is screw-coupled to the first guide helix coupling portion and inserted into one side of the hollow portion. The first fastening unit includes first fastening members, which are slidably coupled to the first guide sloping portions.

A high-strength one-touch rebar coupler includes a coupler body having a hollow portion in the longitudinal direction. The coupler body is formed in a helical shape to provide the inner peripheral surface of the hollow portion with a rebar fastening force in the circumferential direction. The coupler body includes a first guide helix coupling portion, which has first guide sloping portions that slope from the center portion of the hollow portion towards the outside of one side thereof, and a second guide helix coupling portion, which has second guide sloping portions that slope from the center portion of the hollow portion towards the outside of the other side thereof. A first fastening unit is screw-coupled to the first guide helix coupling portion and inserted into one side of the hollow portion. The first fastening unit includes first fastening members, which are slidably coupled to the first guide sloping portions.

Rebar-based support assemblies that can be fabricated without the need for on-site welding. The assemblies include a number of differing sized and shaped crimps used in place of welds to provide rebar assembly-to-rebar assembly connections. Each crimp mechanically couples two or three pieces of rebar together, such as a border bar of one rebar assembly to a border bar of an adjacent rebar assembly. Each crimp includes a body with two or more arcuate recessed surfaces each for receiving a piece of rebar. In a first configuration of the crimp, a pair of spaced-apart arms (or extending members) extend from the body and define an opening through which the rebar is passed and set into the recessed surfaces. A deformation force is applied upon the two arms to deform the body into a second configuration with the arms in abutting contact or nearly so at an outer tip or end.

Rebar-based support assemblies that can be fabricated without the need for on-site welding. The assemblies include a number of differing sized and shaped crimps used in place of welds to provide rebar assembly-to-rebar assembly connections. Each crimp mechanically couples two or three pieces of rebar together, such as a border bar of one rebar assembly to a border bar of an adjacent rebar assembly. Each crimp includes a body with two or more arcuate recessed surfaces each for receiving a piece of rebar. In a first configuration of the crimp, a pair of spaced-apart arms (or extending members) extend from the body and define an opening through which the rebar is passed and set into the recessed surfaces. A deformation force is applied upon the two arms to deform the body into a second configuration with the arms in abutting contact or nearly so at an outer tip or end.

A telescopic bar for load transmission which, if anchored in concrete slabs, creates a support between them, forming semi-rigid joints, and prevents differential settlement of the slabs, by enabling rotation in the vertical direction about a joint axis. The telescopic bar transmits a load from one slab to an adjacent slab, ensures perfect leveling of the slab surfaces, and enables removal and reuse of the slab at a later time. The telescopic bar may be used for constructing floors of easily manufactured prefabricated materials, and creates a new paradigm for the construction of roads, seaports, airports, railways, industrial areas, etc.